A sort of dynamic resource allocation algorithm based on low cost protective framework in WDM-EPON

In view of the shortcoming existing in bandwith allocation and access technique in WDM-EPON at present,a sort of novel low cost protective framework and dynamic resource allocation algorithm is proposed in this paper.The aim is to reduce connective cost in the WDM-EPON and enhance transmission efficiency.The low cost protective framework recovers the optical failure by fast wavelength switching between control and data channel.The resource allocation algorithm is implemented after the REPORT messages from unstable traffic ONU received at the end of ONUN-1,and then assigns available wavelength by considering bandwidth reallocation among ONUs for differentiated traffic classes in the WDM-EPON.Simulations show that the protective framework and algorithm proposed not only can reduce the overall end-to-end delay in differentiated traffic,but also enables working feeder fibers to provide a quick recovery mechanism to reduce cost of the conventional protective framework.